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Journal of Bacteriology, August 2006, p. 5626-5631, Vol. 188, No. 15
0021-9193/06/$08.00+0     doi:10.1128/JB.00250-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

A parA Homolog Selectively Influences Positioning of the Large Chromosome Origin in Vibrio cholerae

Djenann Saint-Dic,1 Brian P. Frushour,1 Jason H. Kehrl,1 and Lyn Sue Kahng1,2*

Section of Digestive Diseases and Nutrition, University of Illinois at Chicago,1 Jesse Brown VA Medical Center, Chicago, Illinois2

Received 17 February 2006/ Accepted 19 May 2006

A Vibrio cholerae deletion mutant lacking VS2773, a parA partitioning gene homolog located in a parAB operon on the large chromosome, displays altered positioning of the large chromosome origin. Deletion of a second parA homolog on the large chromosome (VC2061) does not affect its origin positioning. The origin position of the small chromosome is unchanged by either or both of these deletions, suggesting that VC2773 function is specific to the replicon on which it is carried. VC2773 and VC2772 form a parABS system with inverted repeats found near the large chromosome origin.

* Corresponding author. Mailing address: Section of Digestive Diseases and Nutrition, University of Illinois at Chicago, 840 S. Wood Street (MC 716), Chicago, IL 60612. Phone: (312) 996-6387. Fax: (312) 996-5103. E-mail: lynsue{at}uic.edu.

Journal of Bacteriology, August 2006, p. 5626-5631, Vol. 188, No. 15
0021-9193/06/$08.00+0     doi:10.1128/JB.00250-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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